Gripper



May 25 1926.

B. JQRGENSEN GRIPPER Filed Nov. 14, 2 Sheets-Sheet Ma 25,1926. 1,585,722i B. JORGENSEN GRIPPER Filed Nov. 14, 1922 2Sl1eets-Sheet 2 Patented May25, 1925.

UNITE 'r'r aren't OFFICE.

BERNHARDT cronomvsnn, or BEVERLY, massacirusn rrs, Assienoarc crushersacs.

MACHINERY coaroaarion, or Para-neon, new mess A coat-marrow or JERSEY.

GRIZPZPEB.

Application filed November 14, 1922. Serial No. 600,946.

This invention relates to grippers, and is illustrated as embodied in atoe gripper for use in pulling-over machines which include in theirorganization means forv lasting the toes of shoes. It willbe recognized,however, that in many of its aspects the invention is not limited togrippers for that particular type of machine nor to grippers for pullingthe toe ends of uppers In pulling-over machines, and particularly suchmachines as include toe lasting means, it is desirable that the toegripper engage the upper materials for a substantial distance about theend of the toe, and to secure the best results the shape of the gripperjaws should approximate as closely as possible the contour of the edgeof the last bottom about the toe end of the last. It has been the aim toaccomplish this in prior machines by mounting two pairs of gripper jawsfor pivotal movement each about an axis at the toe end of the last, sothat the angle between them may be changed according to the angle atwhich the sides of the last converge toward the toe. It is founddiiii'cult, however, to swing the pairs of jaws far enough toward eachother to approximate at all closely the contour of the toe of a verypointed last, and, moreover, there is a. narrow section of the uppermaterials at the end of the toe, at the point where maximum pulling-overtension is desired, which is not engaged by either of the pivoted pairsof jaws.

Among its objects, the present invention aims to provide a gripper whichmay be readily adapted to varying requirements, as in operating ondifferent sizes and styles of shoes, by the substitution of diiierentgrip per jaws, thereby rendering it feasible, for example, in pullingthe toes of uppers t utilize jaws that are shaped in substantialconformity to the contour of the edge of the last bottom about the toe end,as herein illustrated, engaging the upper continuously about the end ofthe toe. In its illustrated embodiment the invention provides, incombination with the gripper casing of a wellknown type of gripper, apair of gripper jaws so mounted as to be readily detachable as a unitfrom the casing to permit the substitution therefor of jaws having adifferent shape. The construction shown comprises a gripper having tworeadily separable parts, one of which carries the gripper aws and servesas a holder for the jaws and has also mounted therein the usual gripperjaw closing member or slide, the latter being readily disconnectiblefrom the gripper bar which operates it to permit the substitution ofadiilferent jaw unit.

The above and other objects and features of the invention, includingvarious novel cornbinations and improved constructions, will be apparentfrom the following description of one form of my invention shown in theaccompanying drawings, in which:

Figure 1 is a front elevation, partly broken away, of a toe gripper;

Fig. 2 is a view, partly in side elevation and partly in section, of thegripper as the parts are positioned in the upper pulling operation Fig.3 is a perspective view of a detached unit comprising one of the pairsof interchangeable gripper jaws; and

Figs. 4, 5 and 6 are bottom plan views" showing differentinterchangeable gripper jaws, curved to correspond to the contours ofthetoeends of diiierent lasts.

These drawings illustrate the invention in its application to a gripperadapted for use in pulling-over machines of a well-known type, andembodying in its organization characteristic features shown anddescribed in United States Letters Patent No. 1,030,264, granted on June18, 1912, upon an application of R, F. McFeely, the gripper herein shownhaving also certain features of construction adapting it for use inpullingover and toe lasting machines as illustrated in Letters PatentNo. 1,280,613, granted October 1, 1918, upon an application of OrrellAshton, and Letters Patent No; 1,379,924, granted upon my priorapplication on May 31, 1921, p

The illustrated gripper includes an u per part comprising an elongatedcasing or car'- rier and, for purposes of the present invention, a lowerpart 22, formed with slidingly interengaging tongue and groove portions,and detachably secured together by a latch 24 (Fig. 1) urged by aleaf sring 26 through a hole in one side wall oi part 20 into a correspondingsocket 28 (Fig. 3) in one side wall of part 22. The upper part 20 isformed with the usual shoulders 30 to en gage the frame of the machinewhen the gripper is in its initial position. This part or casing isformed by attaching a cover plate 32 to a channeled member 34: by tapscrews in the usual manner. As in the construction shown in myabove-identified Patent No. 1,379,924, the casing herein shown alsoforms a support for a toe hold-down 36 operated by a bar 38 slidinglyguided by the casing. The hold-down is mounted on an arm 40, pivoted tothe bar 38 at 42, and urged toward the casing by a spring a l. Arm 40 isformed with a cut-out portion 46 to engage a part of the sole rest,.asexplained in my prior patent.

The upper part 20 incloses and guides a gripper-operating bar 50,arranged to be operated by means of the usual updraw lever (not shown).This bar is recessed to receive a coil spring 52, seating against a stop5 lcarried by part 20 and yieldingly urging the bar and the casing inopposite directions. The lower end of the bar comprises a fork 56(Fig. 1) straddling the stop 54, and be tween the arms of the fork ispivotally mounted a latch 58, yieldingly rocked down ward and forward bya spring plunger 60 engaging a stop 62 fixedly mounted between the armsof fork 56.

The lower part or aw holder 22 carries an inner fixed jaw member securedby a bolt 72 and nut 74, and an outer movable jaw member 76, arranged torock with a pivot pin 78 held in place in the part 22 by a guard 80locked by nut 7 4:. J aw member 76 is formed with an operating extension82 having a cam surface engaged by a roll 8% carried by a channel-shapedclosing slide 86. This slide is mounted for a limited rectilinearsliding movement in part 22, and is formed with a wedge-shaped crossportion 88 arranged to be engaged by latch 58 releasably to secure theclosing slide to the gripper-operating bar. The closing slide alsocarries a trip device 90 for disengaging latch 58 to release the closingslide, to permit the gripper jaws to open, and also to permit separationof parts 20 and 22 when a different pair of gripper jaws is desired.This device may be operated manually when removing the aws, or justbefore operating the toe lasting wipers, or it may be operatedautomatically for opening the jaws by engagement with a moving part ofthe machine such as the front tacker arm.

In operation, several interchangeable gripper jaw units having jaws ofdifferent shapes will be provided, each unit comprising the parts shownin Fig. 3, three pairs of jaws of different shapes being illustrated inFigs. 4, 5 and 6. The operator selects that one of the units having jawsmost closely approximating the contour of the toe end of the last in thesize and style of shoe upon which the machine is to operate. He thenlifts latch 2e against the resistance of spring 26, releases latch 58 bypressing the member 90 inward with one finger sufliciently to clear thecross portion 88 of the closing slide, and after removing the unitpreviously used pushes the selected unit upwardly until the two partsare detachably secured together by latch 24: and the closing slide andthe grip per-operating bar are releasably connected by latch 58.

When the gripper-operating bar is lifted by the updraw lever, theclosing slide is lifted by latch 58 to close the gripper jaws on theupper materials of the shoe, and thereafter the entire gripper includingthe gripper jaws 70, 76, is lifted bodily to pull the upper over the toeend of the last. The casing 20 is held down while the jaws are closingby spring 52. \Vhen the upper materials are engaged by the lasting meanstrip 90 may be operated manually, or it may be arranged to be operatedby engagement with the tacker arm, to permit the lasting operation to beperformed by means such as shown in the above-identified Ashton andJorgensen patents.

\Vhile my invention has been described as embodied in a gripper for amachine for pulling-over and lasting the toes of shoes, it is not myintention to limit its scope by such description, or otherwise than bythe terms of the appended claims.

Having described my invention, what I claim as new and desire to secureby Letters Patent of the United States is 1. A gripper for apulling-over machine comprising, in combination, a supporting carrier, areadily-detachable part mounted thereon, a pair of gripper jaws mountedon said part, and a latch arranged to secure said part in one positiononly on the carrier and affording a quick release for said part topermit its removal from the carrier.

2. A gripper for a pullingover machine comprising, in combination, asupporting carrier, a separate part carrying gripper jaws, said carrierand part being formed with relatively slidable tongue and grooveportions, and a latch for detachably securing the carrier and said parttogether in a single fixed relation before the gripper is operated.

8. A gripper for a pulling-over machine comprising, in combination, twointer-engaging readily separable parts, a pair of gripper jaws mountedon one of said parts, and gripper-operating means associated with saidother part including a latch affording a quickly releasable connectionto the gripper jaws.

41:. A gripper having, in combination, two readily separable parts, apair of gripper jaws mounted on one of said parts, a gripper bar movablein the other of said parts,

and means comprising a latch detachably connecting the gripper bar andgripper jaws.

5. A gripper having, in combination, two readily separable parts, a pairof gripper jaws mounted on one of said parts, a gripper-operating memberassociated with the other part, and a gripper closing device mounted inthe first part and connected to said operating member, thegripper-operating member and the gripper-closing device beingconstructed and arranged for substantially instantaneous disengagementto perinit said parts to be separated.

(3. A gripper having, in combination, two readily separable parts,gripper jaws and a closing slide carried by one part, and agripper-operating bar movable in the other part.

7. A gripper having, in combination, two readily separable parts,gripper jaws and a closing slide carried by one part, agripper-operating bar associated with the other part, and means forreleasably connecting the gripper-operating bar and the closing slide.

8. A gripper having, in combination, two readily separable parts,gripper jaws and a closing slide carried by one part, a gripperoperatingbar mounted in the other part, a releasable connection between thegripperoperating bar and the closing slide, and a device for trippingsaid connection to release the closing slide.

9. A gripper having, in combination, two readily separable parts, agripper-operating connection comprising two corresponding readilyseparable parts mounted respectively in the different first named parts,and a pair of gripper jaws mounted on one of the firstnamed parts inposition to be operated by the corresponding part of said connection.

10. In mechanism of the class described, a supporting member constructedand arranged to carry any one of a plurality of interchangeable gripperjaw units each comprising an assembled pair of aws, a plurality of saidunits comprising jaws of diiierent shapes, a gripper-operating member incooperative relation to said supporting member, and means for securingany one of said interchangeable jaw units in operative relation to saidgripper operating member.

11. A gripper jaw unit comprising, in combination, a holder constructedand ar ranged to be detachably secured to a gripper casing, a pair ofgripper jaws mounted on said holder, and a closing device for said jawsmovably mounted within the holder.

12. A gripper jaw unit comprising, in combination, a holder constructedand arranged to be detachably secured to a gripper casing, a pair ofgripper jaws mounted on said holder, and a closing slidemounted forrectilinear movement on said holder and having means for effectingrelative closing movement of said jaws.

13. A gripper comprising, in combination, an elongated holder casing, aholder for an assembled pair of gripper jaws, said casing and holderhaving interengaging faces for guiding the holder lengthwise of thecasing into predetermined relation to the casing, and means forvdetachably securing the holder in such relation to the casing.

14. A gripper comprising, in combination, a casing movable to pull ashoe upper, a holder having a pair of co-operating gripper jaws mountedthereon, and a latch for detachably securing said holder inpredetermined relation to the casing.

15. A gripper comprising, in combination, an elongated casing, a gripperjaw holder carried by said casing, a pair of gripper jaws mounted onsaid holder, a jaw closing member movably mounted on said holder, saidholder with its jaws and the jaw closing member being detachable as aunit from the casing, a gripper bar extending length-,

wise of said casing, and a member for detachably connecting said gripperbar to the closing member.

16. A toe gripper for a pulling-over niachine comprising, incombination, a gripper casing constructed to support in operativeposition any one of a plurality of interchangeable gripper jaw unitseach comprising a gripper jaw holder and co-operating gripper jawsmounted thereon and curved to conform approximately to the curva-ture ofthe edge of a last ibottom about the toe, means for detachably securingany one of such units to'the casing to permit units with difierently'curved jaws to be substituted for different styles or sizes of shoes,and mechanism in said casing for closing the jaws and for operating themto pull an upper.

In testimony whereof I have signed my name to this specification.

BERNHARDT J ORGENSEN.

Certificate of Correction.

It is hereby certified that in Letters Patent No. 1,585,722, granted May25, 1926, upon the application of Bernhardt Jorgensen, of Beverly,Massachusetts, for an improvement in Grippers, errors appear in theprinted specification requiring correction as follows: Page 1, line 44:,for the Word end read and; page 3, line 67 claim 13, for the Word holderread hoZZow; and that the: said Letters Patent should be read with thesecorrections therein that the same may conform to the record of the casein the Patent Office.

Signed and sealed this 16th day of November, A. D. 1926.

[SEAL] M. J. MOORE,

Acting Commissioner 0 7 Patents.

